Perhaps you should try some spelling variations:
sinh nganh » sinh danh, minh ngan, tich nganh
sach thanh » sach tranh, sach tham, danh thanh
nganh khoa » nganh hoa, nganh khong, doanh khoa
khoa thai » hoa thai, khoa than, khoa tai
te sach » toc sach
pho phi » phi phi, pho phu, pho thai
ho phi » hoa phi, hoc phi, ho chi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( te sach thanh ((pho phi) OR (ho phi)) đong luc ) or ( hoc sinh nganh khoa thai đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach thanh ((pho phi) OR (ho phi)) đong luc ) OR ( hoc sinh nganh khoa thai đong luc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( te sach thanh ((pho phi) OR (ho phi)) đong luc ) or ( hoc sinh nganh khoa thai đong luc ))".
• Adding a wildcard symbol may retrieve word variants: (( te sach thanh ((pho phi) OR (ho phi)) đong luc ) or ( hoc sinh nganh khoa thai đong luc ))*.